Aib-contbolling attachment foe



W. A. GIBSON.

AIR CONTROLLING ATTACHMENT FOR CARB URETERS.

APPLICATION FILED szrmzs. I911.

. 1,323,044a Patented Nov. 25, 1919.

' in which this air is taken from the P FE wrLLIAr/rn. oisson, or DENVER, ooLonAno.

AIR-CONTROLLING ATTASHMENT FOR CARBURETERS.

To all whom it may concern: 7

- Be it known that I, F-YILtiAi t A. GIBsoN, a citizen of the United States, residing in the city and county of Denver and State of Colorado, have invented certain new and useful Improvements in Air- Controlling Attachments for Carbureters; andI do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled .in the art towhich it appertains to make and use the same, ref erence being had to the accompanying drawings, and .to the characters of reference marked thereon, which form'a part of-this specification. 1

My invention relates to means for control ling the passage of air'to carburetors, being more especially intended for use in connection with the branch pipe or conduit for supplying hot airto carbureters of the class manifold of the engine.

This device consists specifically of a hol low member connected with the said hot air pipe or conduit, the said member having three sides,one of which is on the carbureter side and is provided with an opening in communication with the conduit. The second side is also provided with one or more openings which are in communication with the conduit on the side opposite the carburetor while the third side is provided,

with .an opening in communication with-the atmosphere. The openings in the second side of the hollow member are controlled by normally closed, gravity operated, inwardly opening, check valves, while the opening in the third sideof the hollow memher is controlled by a normally closed gravity operated,- outwardly opening check valve,

i the valve .or valves for controlling the open-' ing or op'eningsin the second side of the said member regulating. the inlet of hot air to the carbureter, while the function of the outwardly opening'check. valve onthe third side of this member is to relieve excess pressure due to back firing, said pressu'reescaping through the openingcontrolled by this valve; The second and .third'sides of the hollow member are positioned to maintain their respective check valves normally closedand under the infiuence of gravity, as heretofore explained.

Having briefly outlined my improvement, I will proceed to describe the same in (ic Specification of Letters Patent.

exhaust Patented Nov. 25, 1919.

Application filed September 25,1911. Serial No. 133,095.

tail, reference being made to'the accompanying drawing in which is illustrated an embodiment thereof.

In this drawing: t

Figure 1 is a fragmentary View of the forward extremity of an automobile with the hood partly broken away to expose the engine on the carbureter side, my improvement being shownin place.

Fig. 2 is adetail sectional View, taken. on the line 22, Fig. 3, shown on a much larger scale, being approximately full size.

Fig. 3 is an elevation of the device looking in the direction of the arrows adjacent the line 3 8, Fig. 2.

Fig. 4 is a perspective view of the device partly broken away;

Fig.1 5 is an elevation of the device looking in the direction of arrows 5, Fig. 2.

Fig. .6 is a section taken on the line 66, Fig. 2, viewed in the direction of the arrows.

. The same reference characters indicate thesame parts in all-the views. Let the numeral 5 designate my improved fdevice considered in its entirety, and as illustrated in the. drawing being triangular in carburetor 9 of the'engine. This side is 7 provided with an opening 10, which is surrounded by a collar 12 which is fittedinto or operatively connected with, in any suitable manner, the part 13 of the hot air pipe 14c which connects the exhaust. manifold 15 with the carbureter. In other words, my improved device is connected with the hot air conduit by dividingthe latterrbetween its extremities and preferably near the carbureter, and insertingthe device therein, the

collar 12 being connected with the hot air pipe member on the carbureter side while a collar 16 on the opposite side is connected with the other. member of the hot air conduit. Hence, the opening 10 in the side 6 is in direct communication with the carbureter. The opposite side 7'as illustrated in the drawing is provided with two openings 17 both of which are in communication with the hot air conduit by way of the collar16. This side 7 of the device is inclined to the vertical sufliciently to maintain gravity operated valves 18 in position to closetheir respective openingsjlT. Each of these check valves, as illustrated in the drawing, consists out a plate Whose upper edge is hinged, as shown at 19, to the inner surface of the sideavall? and in such' a manner that it opens inwardly, the upper edge'ot the check valve having lip which extends slightlyinwardly :trom' the adjacent surface of the wall, the angle 'or" the lip with the body of the'valve being suchas to permit thevalve to open the neoessary distance, :but at thesame timelimit ing the openin movement} As heretofore stated, each of these valves is normally closed. They open, however, in response tothesuction of the engine and in actual practice have a sort oftioating action cone stantly movingback and forth ad] acent their respective openings and in this way properly and automaticallycontrolling the air inlet. to thecarbureter in such a manner that theexplosive mixture is properly. tempered or oxidised, while at the same time such an excess of air as would unduly dilute the mixture is'obviated. The side 8 otthe hollow' member is uppermost andv provided with an opening 21 which is normally closed and operation of my improvement will be,

partial vacuum produced in-the hollow mem berby the engine suction. This valve, however, opens in -response to the back firing force of the engine and thus prevents injury to any-part of the structure by reason ofsuch force.- 7 From the foregoing descr pt om'the use readily understood. The device being interposed in the hot air pipe between the-twomembers 13and 14cthereof, when the engine is in operation the resulting suction opens the normallyclosed check valves-18 and allows the necessary: hot air to enter the car-'- I bureteri'from the exhaust manifold, the said a v valves vibrating in such a manner asto properly control the. entrance of air, their maxi-mum opening movement, however, be

" the"purpose or that morethan two may he 'inglimited bythe lips 2020f theflvalves,

which are properly arranged for-that purpose, a'sheretotore explained- I "have illus trated in" the drawing 'two'of'these check valves, but it is believed'that one'wil'l answer and description exceptcas defined bythe apsecond of which has an opening in'c'ommuniemployed desired. fIn' my demonstrae fio .tionslhave obtained the best results by employing two, but it should be understood that the invention is not limited to the specific disclosure as set-forth in the drawing pended claims.

r The check valve 22 opens outwardly and is normally-closed {by gravityby virtue ofi the peculiar inclination of th wall or side 8 of the hollow member Hence, the suction of the engine, whereby a partial vacuum is produced, has a tendency' to-maintain this valve in the tightly closed position. However, in the event-that back firing occurs, this valve opens outwardly and prevents injury to anypart of the structure.

Having thus describedv my invention, whatliclaim is'. 1 i 1. An air: controlling. attachment for car'- bureters comprising a hollow member conneotedfwith th air supply conduit of the carloureter and havingthre'e sides, the first or" Which has anv opening in communication with the conduit on the carbureter side, the

cation with the conduit-on the opposite side,

whilethe third has an opening conununicating with the atmosphere, .the second and third sides carrying gravity operated check valves.-,and"having an angle with the vertical of such a degree thatthe-valves :willn'ot bemoved movements :of *the vehicle on Which-the device is used, whereby the'said Valves normally close said openings, the valves opening respectively inwardly andoutwardly, the valves being freely mounted so as to bel closed solely. by force of gravity. 1 2. Anralr controlling attachment'fdr car bureters having a -hotz-ailpipe-. connection with the exhaustmanifold, comprising-la hollow member triangular in cross section, the first side having'an. opening in communication with thelearbuneter, the second 1 side having an opening in communication I with the "hot air pipe and controlled. by 1 a normally closed, gravity operated inwvardly opening .checli val-v e,"while thethird side hasaniopening.controlled by-a gravity operated, normally closed, outwardly opening ehech fvailve, each of said check-valves D; havmgmeansfor-limiting atsppe-ning movej. i

ment and preventing- 1 its remaining open, said {second and third sides "being atanian gleto the vertical "ota degreefsuch-that said valves iwil'l not be opened by movern'e'ntsot the vehicle on which thedevice is- 'used. i In testimony whereof I Lmy signa-ture;

' n,ornsou..- 1 

